The term affirmation, which means 'reinforcement', characterizes a method of making the subconscious more receptive to new content. Mnemonic sentences with strong expressive power are formed, which the client internalizes and repeats when the situation requires it, in order to draw strength from them; in an act of autosuggestion. In this process, the forcefulness is increased by repeating the sentence or using a special speech style. The affirmation can happen both in the state of waking consciousness, and during hypnosis. However, autosuggestion cannot succeed if the client does not believe or is not willing to believe in the affirmation himself. One takes this into account by not coining too far-fetched mnemonic sentences for the client.